'''
Function:
    CodaLab模拟登录
        --PC端: https://competitions.codalab.org/
        --移动端暂不支持
Author:
    Charles
微信公众号:
    Charles的皮卡丘
GitHub:
    https://github.com/CharlesPikachu
更新日期:
    2020-03-31
'''
import re
import requests


'''
Function:
    CodaLab模拟登录
Detail:
    -login:
        Input:
            --username: 用户名
            --password: 密码
            --mode: mobile/pc
            --crackvcFunc: 若提供验证码接口, 则利用该接口来实现验证码的自动识别
            --proxies: 为requests.Session()设置代理
        Return:
            --infos_return: 用户名等信息
            --session: 登录后的requests.Session()
'''
class codalab():
    def __init__(self, **kwargs):
        self.info = 'codalab'
        self.session = requests.Session()
    '''登录函数'''
    def login(self, username, password, mode='pc', crackvcFunc=None, **kwargs):
        # 设置代理
        self.session.proxies.update(kwargs.get('proxies', {}))
        # 移动端接口
        if mode == 'mobile':
            raise NotImplementedError
        # PC端接口
        elif mode == 'pc':
            self.__initializePC()
            # 获得csrfmiddlewaretoken参数
            res = self.session.get(self.token_url)
            csrfmiddlewaretoken = re.findall(r"name='csrfmiddlewaretoken' value='(.*?)'", res.text)[0]
            # 构造登录请求
            data = {
                        'csrfmiddlewaretoken': csrfmiddlewaretoken,
                        'login': username,
                        'password': password,
                        'remember': 'on',
                        'next': '/'
                    }
            self.session.headers.update({'Referer': self.token_url})
            res = self.session.post(self.login_url, data=data, allow_redirects=False)
            res = self.session.get(self.home_url)
            # 登录成功
            if (res.status_code == 200) and (username in res.text):
                print('[INFO]: Account -> %s, login successfully...' % username)
                user_id = re.findall(r'user_id: (\d+),', res.text)[0]
                email = re.findall(r'email: "(.*?)",', res.text)[0]
                infos_return = {'username': username, 'user_id': user_id, 'email': email}
                return infos_return, self.session
            # 登录失败
            else:
                raise RuntimeError('Account -> %s, fail to login, username or password error...' % username)
        # mode输入有误
        else:
            raise ValueError('Unsupport argument in codalab.login -> mode %s, expect <mobile> or <pc>...' % mode)
    '''初始化PC端'''
    def __initializePC(self):
        self.headers = {
                            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36',
                            'Host': 'competitions.codalab.org'
                        }
        self.token_url = 'https://competitions.codalab.org/accounts/login/?next=/'
        self.home_url = 'https://competitions.codalab.org/'
        self.login_url = 'https://competitions.codalab.org/accounts/login/'
        self.session.headers.update(self.headers)
    '''初始化移动端'''
    def __initializeMobile(self):
        pass


'''test'''
if __name__ == '__main__':
    codalab().login('', '')